Gerhard IV of Holstein-Plön

Gerhard IV (c. 1277–1323) was Count of Holstein-Plön from 1312, the eldest son of Count Gerhard II and Ingeborg of Sweden. In 1313 he married Anastasia, daughter of Nicholas I of Schwerin.

Soon after succeeding, in 1314 he sold almost all of his inheritance to his younger brother John III, keeping little beyond the comital title. He died around 1323, leaving a son Gerhard V, a Lübeck canon, and a daughter Ingeborg, who married Count Conrad I of Oldenburg and mothered Christian V of Oldenburg.